Hey, KK...Wishing you the best of luck !
Around here (NW Florida), the "new" mantra is : "The first 72 is on you !!!" In other words, try to think of what you'll need to survive on your own for 72 hours. That doesn't sound like long, but it's amazing how long that SEEMS when you're living "back-to-basics" ! Think about other stuff like any Rx meds you may need...the pets (if any !)...Gas up the car is a good idea ; get some cash out of the ATM is also recommended, since if you lose power for any length of time, it's hard to use the old debit card. Tub filled with water is also standard advice.
72 hours is supposed to be when the relief agencies really begin cranking up...FEMA, etc. I suspect disaster response in Hawaii poses some unique challenges that we don't see here in the lower 48...for instance, FEMA usually begins trucking in ice by the ton, to try and preserve those reefer foods. OTOH, I've known people who, after the storm, just have a huge block party, and grill and share whatever food that might go bad !
Another thing around here that amazes me is, the response from the utility companies...I guess they all have mutual support agreements, so when something bad happens, crews roll in from all over the place ! When we lived in Maryland, and had an ice storm that knocked us out of power for 4 days, we were finally brought back on-line by a crew from Florida Power and Light (South Florida) ! OTOH, when hurricanes hit in FL, you can see convoys of linemen, bucket trucks and pole trucks headed south on the Interstate from the likes of Duke Power (VA) and good old BGE (Baltimore Gas and Electric) ! Not sure how that would play out in the Islands, though....
A few other things...if you have cable phone and internet, DON'T expect those to be restored as fast as regular "utilities"...also, with cell phones, coverage may be spotty, but I've been surprised at how the major cell phone carriers beef up their emergency generators, etc, at their tower sites before a storm actually hits.
...and re: TP ? I never understood that one, either ! That's NOT unique to hurricanes, though...in MD, the same thing happens when they even HINT at a possible 1" of snow !!! The Wife and I started calling it "The White Death", the way folks reacted

You should'a seen how fast they cancel school !!!
Stoplight...